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NEW YORK ( TheStreet) -- Hedge fund manager John Paulson made billions betting against housing, Jim Cramer said on "Mad Money" Wednesday. Now that Paulson's turned bullish, you should, too. Cramer said he was shocked at how bullish Paulson was when interviewed at CNBC's Delivering Alpha conference earlier Wednesday. He said Paulson was known as one of the biggest bears betting against housing in 2008 and 2009, but now the famed fund manager told investors their best bet would be to buy a home, and their second would be to buy another one. Paulson is now a fan of AAA-rated mortgage bonds, said Cramer, the same bonds that he despised just a few years ago. That news made Cramer reiterate his recommendations of companies such as Realogy ( RLGY), which have the most exposure to the sector. Cramer said he's also still a fan of Bank of America ( BAC) and Wells Fargo ( WFC), a stock he owns for his charitable trust,